Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel Production
Solar thermochemical hydrogen (STCH) produced by heat-driven water-splitting is a promising route for producing green hydrogen and other zero-emission synfuels. However, the efficiency of STCH must be dramatically increased for it to make an impact on decarbonization efforts. We have previously pre...
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TIB Open Publishing
2024-10-01
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| Series: | SolarPACES Conference Proceedings |
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| Online Access: | https://www.tib-op.org/ojs/index.php/solarpaces/article/view/936 |
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| author | Aniket S. Patankar Xiao-Yu Wu Wonjae Choi Harry Tuller Ahmed Ghoniem |
| author_facet | Aniket S. Patankar Xiao-Yu Wu Wonjae Choi Harry Tuller Ahmed Ghoniem |
| author_sort | Aniket S. Patankar |
| collection | DOAJ |
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Solar thermochemical hydrogen (STCH) produced by heat-driven water-splitting is a promising route for producing green hydrogen and other zero-emission synfuels. However, the efficiency of STCH must be dramatically increased for it to make an impact on decarbonization efforts. We have previously presented a novel Reactor Train System (RTS) for significantly increasing the efficiency of STCH by employing heat recovery from the redox material and efficient gas exchange processes. In this paper we present a higher-fidelity model for the RTS that accommodates the slow heat diffusion through the STCH redox material. For this purpose, a novel method is introduced for transient modelling of radiative heat in participating media. This method, called GREENER: Generalized Radiation Exchange Factors and Net Radiation, combines the accuracy of Monte Carlo Ray Tracing with the low computational cost of the P1 or Rosseland diffusion approximations. Along with STCH, GREENER has application for modelling volumetric solar receivers, high temperature heat recovery systems like heat exchangers and regenerators, and packed bed reactors. Using the GREENER method, the RTS counterflow radiative heat exchanger is shown to achieve heat recovery effectiveness greater than 70%. The performance of non-uniform porous redox morphologies is evaluated, and high-performing configurations are identified.
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| format | Article |
| id | doaj-art-b3c1813dca944b3b92e2abe1063d7f8f |
| institution | OA Journals |
| issn | 2751-9899 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | TIB Open Publishing |
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| series | SolarPACES Conference Proceedings |
| spelling | doaj-art-b3c1813dca944b3b92e2abe1063d7f8f2025-08-20T01:47:37ZengTIB Open PublishingSolarPACES Conference Proceedings2751-98992024-10-01210.52825/solarpaces.v2i.936Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel ProductionAniket S. Patankar0https://orcid.org/0000-0001-9386-2395Xiao-Yu Wu1https://orcid.org/0000-0003-4084-3662Wonjae Choi2https://orcid.org/0000-0002-7535-903XHarry Tuller3Ahmed Ghoniem4Massachusetts Institute of TechnologyUniversity of Waterloo Ewha Womans University Massachusetts Institute of Technology Massachusetts Institute of Technology Solar thermochemical hydrogen (STCH) produced by heat-driven water-splitting is a promising route for producing green hydrogen and other zero-emission synfuels. However, the efficiency of STCH must be dramatically increased for it to make an impact on decarbonization efforts. We have previously presented a novel Reactor Train System (RTS) for significantly increasing the efficiency of STCH by employing heat recovery from the redox material and efficient gas exchange processes. In this paper we present a higher-fidelity model for the RTS that accommodates the slow heat diffusion through the STCH redox material. For this purpose, a novel method is introduced for transient modelling of radiative heat in participating media. This method, called GREENER: Generalized Radiation Exchange Factors and Net Radiation, combines the accuracy of Monte Carlo Ray Tracing with the low computational cost of the P1 or Rosseland diffusion approximations. Along with STCH, GREENER has application for modelling volumetric solar receivers, high temperature heat recovery systems like heat exchangers and regenerators, and packed bed reactors. Using the GREENER method, the RTS counterflow radiative heat exchanger is shown to achieve heat recovery effectiveness greater than 70%. The performance of non-uniform porous redox morphologies is evaluated, and high-performing configurations are identified. https://www.tib-op.org/ojs/index.php/solarpaces/article/view/936HydrogenSolar ReceiverMonte Carlo Ray Tracing |
| spellingShingle | Aniket S. Patankar Xiao-Yu Wu Wonjae Choi Harry Tuller Ahmed Ghoniem Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel Production SolarPACES Conference Proceedings Hydrogen Solar Receiver Monte Carlo Ray Tracing |
| title | Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel Production |
| title_full | Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel Production |
| title_fullStr | Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel Production |
| title_full_unstemmed | Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel Production |
| title_short | Efficient Computation of Radiative Heat Recovery from Porous Ceramic Monoliths for Efficient Solar Thermochemical Fuel Production |
| title_sort | efficient computation of radiative heat recovery from porous ceramic monoliths for efficient solar thermochemical fuel production |
| topic | Hydrogen Solar Receiver Monte Carlo Ray Tracing |
| url | https://www.tib-op.org/ojs/index.php/solarpaces/article/view/936 |
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